Event-by-Event Jet Quenching

High momentum jets and hadrons can be used as probes for the quark gluon plasma (QGP) formed in nuclear collisions at high energies. We investigate the influence of fluctuations in the fireball on jet quenching observables by comparing propagation of light quarks and gluons through averaged, smooth QGP fireballs with event-by-event jet quenching using realistic inhomogeneous fireballs. We find that the transverse momentum and impact parameter dependence of the nuclear modification factor R_AA can be fit well in an event-by-event quenching scenario within experimental errors. However the transport coefficient qhat extracted from fits to the measured nuclear modification factor R_AA in averaged fireballs underestimates the value from event-by-event calculations by up to 50%. On the other hand, after adjusting qhat to fit R_AA in the event-by-event analysis we find residual deviations in the azimuthal asymmetry v_2 and in two-particle correlations, that provide a possible faint signature for a spatial tomography of the fireball.Comment: 8 pages, 5 figures; v2: new figure added, small changes and fixes, this version published in Phys. Lett.

Rearrangement collisions between gold clusters

Collision processes between two gold clusters are investigated using classical molecular dynamics in combination with embedded atom (EA) potentials, after checking the reliability of EA results by contrasting them with first principles calculations. The Au projectiles considered are both single atoms (N=1) and clusters of N=2, 12, 13 and 14 atoms. The targets contain N= 12, 13 and 14 gold atoms. The initial projectile energy E is in the range 0 < E < 1.5 eV/atom. The results of the collision processes are described and analyzed in detail.Comment: LATeX file, 8 figures, uses svjour.cl

Your Abjection is in Another Castle: Julia Kristeva, Gamer Theory, and Identities-in-Différance

Typified rhetorical situations are often a result of normalized ideologies within cultures; however, they also have the capability to produce new ideology. Within these discursive sites, identities are constructed among these normalized social acts. More importantly, these identities are constructed across many layers, not limited to one social act, but many that overlap and influence each other. In this paper, I focus on the identities that are constructed in marginalized spaces within sites of interacting discourse. Focusing on the rhetoric of abjection posited by Julia Kristeva, along with McKenzie Wark’s exploration of gamespace, a liminal theoretical space that encompasses the sites of analysis and ideology formation from the perspective of gamers, I analyze disruptions of normalized social practices in the gaming genre in order to implement the use of abjection as a method of understanding how sites of difference produce meaning for minoritarian subjects

Beneficial True Bugs: Minute Pirate Bugs

This fact sheet describes beneficial true bugs: minute pirate bugs. It includes their life cycle and tips for promoting beneficial insects such as conservation and enhancement, predator release, and the predator release process

Using a Sustainable Livelihoods Approach to Assessing the Impact of ICTs in Development

This paper describes the sustainable livelihoods framework as a useful tool in assessing the contribution of ICTs to development projects. Assessing the role of ICTs in development can be difficult because they are so multifaceted, and because the effect of ICT use is often indirect. This paper argues that applying the sustainable livelihood frameworks in assessment can help to broaden their scope in a manageable way and prove more analytically rigorous than other available methods. The example of an impact assessment of a Colombian telecentre is used to demonstrate how such an approach can be applied

Common Crane Fly in Turf

Crane flies belong to one of the most specious families of flies. The adult flies, also known as “mosquito hawks”, are not giant mosquitoes and do not bite, and though the name suggests it, they do not feed on mosquitoes. In general, the larvae are associated with aquatic and semi-aquatic habitats. The majority of crane flies are not pests

Multi-scale molecular descriptions of human heart failure using single cell, spatial, and bulk transcriptomics

Molecular descriptions of human disease have relied on transcriptomics, the genome-wide measurement of gene expression. In the last years the emergence of capture-based technologies have enabled the transcriptomic profiling of single cells both from dissociated and intact tissues, providing a spatial and cell type specific context that complements the catalog of gene expression changes reported from bulk technologies. In the context of cardiovascular disease, these technologies open the opportunity to study the inter and intra-cellular mechanisms that regulate myocardial remodeling. In this thesis I present comprehensive descriptions of the transcriptional changes in acute and chronic human heart failure using bulk, single cell, and spatial technologies. First, I describe the creation of the Reference of the Heart Failure Transcriptome, a resource built from the meta-analysis of 16 independent studies of human heart failure transcriptomics. Then, I report the first spatial and single cell atlas of human myocardial infarction, and propose a computational strategy to identify compositional, organizational, and molecular tissue differences across distinct time points and physiological zones of damaged myocardium. Finally, I outline a methodology for the multicellular analysis of single cell data that allows for a better understanding of tissue responses and cell type coordination events in cardiovascular disease and that links the knowledge of independent studies at multiple scales. Overall my work demonstrates the importance of the generation of reliable molecular references of disease across scales